java 1.8 source compatibility

Author: joke

build.gradle

@@ -11,14 +11,16 @@ allprojects { project ->
         mavenCentral()
     }
 
+    plugins.withType(JavaBasePlugin) {
+        sourceCompatibility = JavaVersion.VERSION_1_8
+        targetCompatibility = JavaVersion.VERSION_1_8
+    }
+
     plugins.withType(MavenPublishPlugin) {
         project.plugins.apply 'signing'
 
         plugins.withType(JavaPlugin) {
             java {
-                tasks.withType(JavaCompile) {
-                    options.release = 8
-                }
                 withJavadocJar()
                 withSourcesJar()
             }

spock-outputcapture/build.gradle

@@ -4,11 +4,6 @@ plugins {
     id 'maven-publish'
 }
 
-java {
-    withJavadocJar()
-    withSourcesJar()
-}
-
 dependencies {
     compileOnly platform('org.codehaus.groovy:groovy-bom:3.0.7')
     compileOnly platform('org.spockframework:spock-bom:2.0-M4-groovy-3.0')